is strictly increasing, and is strictly decreasing, so the solution is unique.

Feb 1st 2009, 01:02 AM

Jhevon

Quote:

Originally Posted by requal

Solve simultaneously.

this is not really simultaneous equation problem. you need more than one equation for that.

note that on the right, if you make x too big (bigger than 7), you get a negative answer. the left side is always positive, so you want to try x values that are less than 7. there is one positive solution (meaning you would try integer values for x). trial and error can find it

Feb 1st 2009, 01:10 AM

Moo

Quote:

Originally Posted by Jhevon

this is not really simultaneous equation problem. you need more than one equation for that.

note that on the right, if you make x too big (bigger than 7), you get a negative answer. the right side is always positive, so you want to try x values that are less than 7. there is one positive solution (meaning you would try integer values for x). trial and error can find it